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Immingham Storage Co Ltd – Immingham East Terminal
IME-SIS1 - Safety Instrument System Safety Requirement Specification
P & I Design Ltd
DOCUMENT NO: SI277010_RPT
2 Reed Street, Thornaby, UK, TS17 7AF
ISSUE: G DATE: 31.10.14
Tel: + 44 (0)1642 617444
PAGE 3 OF 13
Fax: + 44 (0)1642 616447
www.pidesign.co.uk1
REVISION HISTORY
Rev Description
A
Original Issue
B
Revised as per discussions with client
C
Post FSA Stage 1
D
Revised following SIS Design
E
Re-written for the declassification of pipeline import line actuated valves on the No.
4 East series tanks. Tank side valves installed on all tanks on SIS duty.
F
XV56701 Installed. Final element response times modified in line with pipeline
surge calculations.
G
Scope reduced to gasoline Tanks 561, 564 & 568
2.0
INTRODUCTION
This document has been prepared for the Safety Instrumented System IME-SIS1 to reflect the
life cycle of the SIS in accordance with BS EN 61508 & BS EN 61511 and to be a working
document throughout the life cycle of the SIS.
SCOPE
Client / Company
-
Immingham Storage Co Ltd
Location / Facility
-
ISCo East Terminal
Plant Unit
-
Tanks 561, 564 & 568
Service
-
No4 East Storage Tank Overfill Protection
SIS Tag No
-
IME-SIS1
SIF’s Tag No’s
-
TK561-SIF1, TK564-SIF1 & TK568-SIF1
SIL
-
2
2.1
Overview of System
A LOPA Risk Assessment was conducted on a Gasoline Import and storage facility on 31
st
January 2007, it was revisited in February, August 2007, July 2010 and June 2011. The
outcome of the assessment showed a shortfall in protection of SIL 2.
Document SI057001_RPT details this assessment.
Tanks 561, 564 and 568 are allocated to store gasoline.
There are however a number of other tanks that have not yet had LOPA assessments but have
had SIS infrastructure to SIL2 installed for the purpose of contractual flexibility should they
be required to store gasoline in the future. LOPA of these tanks will be required should they
be brought into gasoline service and the designed infrastructure confirmed to be suitable. All
tanks will be maintained and proof tested in accordance with BS EN 61511 for the purpose of
collating historical proven in use data. These tanks are :-
No. 4 East tanks 552, 553, 554, 557, 558, 562, 563, 565, 566, 567, 569, 570, 571, 572.